CN105118946B - A kind of preparation method of lithium ion battery separator - Google Patents
A kind of preparation method of lithium ion battery separator Download PDFInfo
- Publication number
- CN105118946B CN105118946B CN201510577172.XA CN201510577172A CN105118946B CN 105118946 B CN105118946 B CN 105118946B CN 201510577172 A CN201510577172 A CN 201510577172A CN 105118946 B CN105118946 B CN 105118946B
- Authority
- CN
- China
- Prior art keywords
- density polyethylene
- barrier film
- hdpe
- high density
- lithium ion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention relates to a kind of preparation method of lithium ion battery separator, including：（1）The preparation of Kynoar hexafluoropropene and high density polyethylene (HDPE) particle polymer blend barrier film；（2）Commercial barrier film and Kynoar hexafluoropropene is compound with high density polyethylene (HDPE) particle polymer blend barrier film.Lithium ion composite battery separator film prepared by the inventive method shows excellent mechanical performance（MD:1700kg/cm2, TD:1300kg/cm2）And thermal stability（The residual mass that composite diaphragm heats 1h at 130 DEG C after electrolyte activation is 88% of quality before heating）, while decomposition voltage is up to 4.6V, the 4.3V of more commercial barrier film has a certain upgrade, and the more commercial barrier film lifting 280% of ionic conductivity, lithium ion transference number 0.54, prepared lithium ion battery shows good cycle performance and high rate performance.
Description
Technical field
The application is related to battery diaphragm field, more particularly to a kind of preparation method of lithium ion battery separator.
Background technology
With the continuous development of lithium ion battery and the variation of battery process, especially power vehicle and Large Copacity energy storage
Battery proposes very high requirement to lithium battery diaphragm in order to realize high magnification repid discharge, both wished barrier film have compared with
High porosity and through hole, and higher requirement is proposed to resistance to elevated temperatures and film-strength, traditional lithium ion battery separator
It is polyolefin, such as polypropylene（PP）And polyethylene（PE）Through physics（Such as pulling method）Or chemistry（Such as extraction）It is prepared by drill process
Porous membrane, such as Japanese Asahi Chemical Industry Asahi, eastern burning Tonen, space portion Ube, Celgard foreign corporations of the U.S. every
Film product.But the defects of polyalkene diaphragm maximum, is that the contact of organic electrolyte is poor, is not easy to be soaked by electrolyte, easily
The leakage of electrolyte is caused, has a strong impact on the ionic conductivity and security performance of lithium ion battery.
Research of the polyvinylidene fluoride polymer as gel polymer electrolyte, starts from the phase at the beginning of the eighties in last century.It is poly- inclined
Repeat unit-the CH of PVF2-CF2-, it is a kind of white powder crystalline polymer, relative density 1.75-1.78, glass
- 39 DEG C of glass temperature, 180 DEG C of molten point, heat decomposition temperature be 350 DEG C, can processing temperature scope it is wide, be easily worked.But due to
Kynoar is homopolymer, and the crystallinity of its intramolecular is higher, more important is-F is contained in molecule, is easily made with lithium metal
With and influence the interface stability between electrode and electrolyte.In order to preferably improve the correlation of base polymer electrolyte system
Can, in Kynoar hexafluoropropene introducings of hexafluoropropene group avoid the intrinsic crystallinity height of Kynoar and interface
The problem of stability deficiency, the addition of hexafluoropropene group, equivalent to one molecule of grafting on molecule, not only reduce original
Carry out the crystallinity of polymeric matrix, while also reduce the reactivity in original molecule, improve between electrode and electrolyte
Interface stability, the material is set to show fabulous electrochemical stability and fire-retardant containing very strong polar group on polymer chain
Ability, while dielectric constant is higher, may advantageously facilitate lithium salts dissolving, increases carrier concentration, be comparatively ideal matrix.It is but simple
Although phase separation the Kynoar system barrier film that is prepared of method with higher porosity, ionic conductance
Rate, heat endurance and chemical property, but its activated by electrolyte after mechanical strength possessed by the gel electrolyte that is formed it is big
It is big to reduce, and traditional polyalkene diaphragm is without this shortcoming.For this using polyalkene diaphragm and modified Kynoar
Barrier film progress is compound, obtains having polyalkene diaphragm good mechanical strength and the good chemical property of Kynoar barrier film and heat concurrently
The new types of diaphragm of stability has realistic feasibility and practicality.
The content of the invention
Therefore, the present invention provides a kind of preparation method of lithium ion battery separator, following steps are specifically included：
（1）The preparation of Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend barrier film：By high-density polyethylene
Alkene 100-220 DEG C of heating 10-60min in dibutyl phthalate is dissolved, and it is small to prepare particle diameter using emulsion polymerization
In 600nm high density polyethylene (HDPE) particle, then by Kynoar hexafluoropropene, high density polyethylene (HDPE) particle and pore former point
It is that 8-25%, 0.01-4% and 0.05%-5.0% heating stirring together with 66%-91.94% organic solvent obtain not by mass fraction
Uniform casting solution is blended in polymer and high density polyethylene (HDPE) particle.Non-solvent used is deionized water, and first film formation time is 5s-
2h, prepared membrane thicknesses are at 10 μm to 40 μm.
（2）Commercial barrier film and Kynoar hexafluoropropene is compound with high density polyethylene (HDPE) polymer blend barrier film：Will
Thickness is laid on clean glass plate less than 30 μm, commercial polypropylene or polyethylene diagrams of the porosity more than 30%, and upper surface is used
Volume ratio is 1:1 ethanol water soaks, and the Kynoar hexafluoropropene prepared and high density polyethylene (HDPE) is blended poly-
Compound barrier film is laid on commercial film, and Kynoar hexafluoropropene is also used with high density polyethylene (HDPE) polymer blend diaphragms
Ethanol water is soaked, and another commercial barrier film is placed on thereon.End of operation, the wet film of preparation is sandwiched in two pieces of clean glass
Between glass plate, 10-50 DEG C of oven drying 3-20 h is placed in, obtains commercial barrier film and Kynoar hexafluoropropene and high-density polyethylene
Alkene particle polymer blend barrier film composite diaphragm, prepared composite film thickness are 40-90 μm.
The step（1）In, organic solvent is N- dimethyl acetamides or N-METHYLFORMAMIDE.
The step（1）Described in pore former be polyvinylpyrrolidone, polyethylene glycol, acetone, organic molecule or
One kind in LiCl inorganic salts.
Preferably, the step（1）Described in the blending of Kynoar hexafluoropropene and high density polyethylene (HDPE) particle it is uniform
Each active ingredient mass fraction of casting solution is：Kynoar hexafluoropropene mass fraction is 15%-20%, pore former mass fraction
For 1%-3%, high density polyethylene (HDPE) mass fraction is 0.1%-2.0%, and wherein the mass percent of organic solvent is 75-83.9%.
Preferably, the step（1）In, first film formation time is 10s-1.5h, and prepared membrane thicknesses are at 15 μm to 40 μm.
Preferably, the step（2）In, commercial polypropylene or polyethylene diagrams thickness used are 15 to 30 μm, porosity
For 30-50%.
Preferably, the step（2）In, oven drying temperature is 30-50 DEG C, drying time 3-10h.It is prepared compound
Film thickness is 45-90 μm.
The lithium ion battery separator that the present invention is prepared not only possesses Kynoar hexafluoropropene and high-density polyethylene
Alkene polymer blend barrier film porosity is high, the chemical property feature that ionic conductivity is good and decomposition voltage is high, at the same by with
Commercial barrier film it is compound, avoid electrolyte activation after formed gel electrolyte bad mechanical strength the characteristics of.Prepared lithium from
Sub- composite battery separator film shows excellent mechanical performance（MD:1700kg/cm2, TD:1300kg/cm2）And thermal stability（Electricity
The residual mass that composite diaphragm heats 1h at 130 DEG C after solution liquid activation is 88% of quality before heating）, while decomposition voltage is high
Up to 4.6V, the 4.3V of more commercial barrier film has a certain upgrade, the more commercial barrier film lifting 280% of ionic conductivity, lithium ion transference number
For 0.54, prepared lithium ion battery shows good cycle performance and high rate performance.
Embodiment
The present invention is described in further detail below by way of specific embodiment.
Embodiment 1
（1）The preparation of Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend barrier film：By high-density polyethylene
Alkene 180 DEG C of heating 45min in dibutyl phthalate are dissolved, and use emulsion polymerization to prepare particle diameter as 200-
400nm high density polyethylene (HDPE) particle, then by Kynoar hexafluoropropene, high density polyethylene (HDPE) particle and polyvinyl pyrrole
Alkanone respectively by mass fraction be 8%, 0.2% and 2.0% together with 89.8% organic solvent heating stirring obtain polymer and height
Uniform casting solution is blended in density polyethylene particle.Non-solvent used is deionized water, and first film formation time is 5s, and prepared barrier film is thick
Spend for 20 μm.
（2）Commercial barrier film and Kynoar hexafluoropropene is compound with high density polyethylene (HDPE) polymer blend barrier film：
Celgard2400 commercializations polypropylene diaphragm (thickness is 25 μm, porosity 41%) is laid in clean glass plate
On, upper surface volume ratio is 1:1 ethanol water is soaked, and the Kynoar hexafluoropropene and the high density that prepare are gathered
Ethene polymer blend barrier film is laid on commercial film, Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend
Diaphragms are also soaked with ethanol water, and another commercial barrier film is placed on thereon.End of operation, the wet film of preparation is sandwiched in
Between two pieces of clean glass plates, be placed in 50 DEG C of h of oven drying 20, produce commercial barrier film and Kynoar hexafluoropropene with
High density polyethylene (HDPE) particle polymer blend barrier film composite diaphragm, prepared composite film thickness are 70 μm.
Lithium ion battery separator prepared by this example, not only has a higher porosity, and porosity is up to 68%；Also, 130
DEG C place 30 minutes, its thermal contraction about 3.5%, i.e., with preferable resistance to elevated temperatures.Excellent mechanical performance（MD:1000kg/
cm2, TD:700kg/cm2）And thermal stability（Composite diaphragm heats 1h residual mass at 120 DEG C and is after electrolyte activation
The 87% of quality before heating）, while decomposition voltage is up to 4.5V, the 4.3V of more commercial barrier film has a certain upgrade, lithium ion conductance
The more commercial barrier film lifting 240% of rate, lithium ion transference number 0.62.
Embodiment 2
（1）The preparation of Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend barrier film：By high-density polyethylene
Alkene 180 DEG C of heating 45min in dibutyl phthalate are dissolved, and use emulsion polymerization to prepare particle diameter as 200-
400nm high density polyethylene (HDPE) particle, then by Kynoar hexafluoropropene, high density polyethylene (HDPE) particle and polyvinyl pyrrole
Alkanone respectively by mass fraction be 14%, 0.2% and 2.0% together with 83.8% organic solvent heating stirring obtain polymer and height
Uniform casting solution is blended in density polyethylene particle.Non-solvent used is deionized water, and first film formation time is 5s, and prepared barrier film is thick
Spend for 20 μm.
（2）Commercial barrier film and Kynoar hexafluoropropene is compound with high density polyethylene (HDPE) polymer blend barrier film：
Celgard2400 commercializations polypropylene diaphragm (thickness is 25 μm, porosity 41%) is laid in clean glass plate
On, upper surface volume ratio is 1:1 ethanol water is soaked, and the Kynoar hexafluoropropene and the high density that prepare are gathered
Ethene polymer blend barrier film is laid on commercial film, Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend every
Also soaked above film with ethanol water, another commercial barrier film is placed on thereon.End of operation, the wet film of preparation is sandwiched in two
Between the clean glass plate of block, 50 DEG C of h of oven drying 20 are placed in, produce commercial barrier film and Kynoar hexafluoropropene and height
Density polyethylene particle polymer blend barrier film composite diaphragm, prepared composite film thickness are 70 μm.
Lithium ion battery separator prepared by this example, not only has a higher porosity, and porosity is up to 63%；Also, 130
DEG C place 30 minutes, its thermal contraction about 2.5%, i.e., with preferable resistance to elevated temperatures.Excellent mechanical performance（MD:1100kg/
cm2,TD:800kg/cm2）And thermal stability（Composite diaphragm heats 1h residual mass at 120 DEG C and is after electrolyte activation
The 89% of quality before heating）, while decomposition voltage is up to 4.6V, the 4.3V of more commercial barrier film has a certain upgrade, lithium ion conductance
The more commercial barrier film lifting 220% of rate, lithium ion transference number 0.63.
Embodiment 3
（1）The preparation of Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend barrier film：By high-density polyethylene
Alkene 180 DEG C of heating 45min in dibutyl phthalate are dissolved, and use emulsion polymerization to prepare particle diameter as 200-
400nm high density polyethylene (HDPE) particle, then by Kynoar hexafluoropropene, high density polyethylene (HDPE) particle and polyvinyl pyrrole
Alkanone respectively by mass fraction be 20%, 0.2% and 2.0% together with 79.8% organic solvent heating stirring obtain polymer and height
Uniform casting solution is blended in density polyethylene particle.Non-solvent used is deionized water, and first film formation time is 5s, and prepared barrier film is thick
Spend for 20 μm.
（2）Commercial barrier film and Kynoar hexafluoropropene is compound with high density polyethylene (HDPE) polymer blend barrier film：
Celgard2400 commercializations polypropylene diaphragm (thickness is 25 μm, porosity 41%) is laid in clean glass plate
On, upper surface volume ratio is 1:1 ethanol water is soaked, and the Kynoar hexafluoropropene and the high density that prepare are gathered
Ethene polymer blend barrier film is laid on commercial film, Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend
Diaphragms are also soaked with ethanol water, and another commercial barrier film is placed on thereon.End of operation, the wet film of preparation is sandwiched in
Between two pieces of clean glass plates, be placed in 50 DEG C of h of oven drying 20, produce commercial barrier film and Kynoar hexafluoropropene with
High density polyethylene (HDPE) particle polymer blend barrier film composite diaphragm, prepared composite film thickness are 70 μm.
Lithium ion battery separator prepared by this example, not only has a higher porosity, and porosity is up to 58%；Also, 130
DEG C place 30 minutes, its thermal contraction about 1.6%, i.e., with preferable resistance to elevated temperatures.Excellent mechanical performance（MD:1100kg/
cm2,TD:800kg/cm2）And thermal stability（Composite diaphragm heats 1h residual mass at 120 DEG C and is after electrolyte activation
The 91% of quality before heating）, while decomposition voltage is up to 4.65V, the 4.3V of more commercial barrier film has a certain upgrade, lithium-ion electric
The more commercial barrier film lifting 205% of conductance, lithium ion transference number 0.60.
Embodiment 4
（1）The preparation of Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend barrier film：By high-density polyethylene
Alkene 180 DEG C of heating 45min in dibutyl phthalate are dissolved, and use emulsion polymerization to prepare particle diameter as 200-
400nm high density polyethylene (HDPE) particle, then by Kynoar hexafluoropropene, high density polyethylene (HDPE) particle and polyvinyl pyrrole
Alkanone respectively by mass fraction be 25%, 0.2% and 2.0% together with 73.8% organic solvent heating stirring obtain polymer and height
Uniform casting solution is blended in density polyethylene particle.Non-solvent used is deionized water, and first film formation time is 5s, and prepared barrier film is thick
Spend for 20 μm.
（2）Commercial barrier film and Kynoar hexafluoropropene is compound with high density polyethylene (HDPE) polymer blend barrier film：
Celgard2400 commercializations polypropylene diaphragm (thickness is 25 μm, porosity 41%) is laid in clean glass plate
On, upper surface volume ratio is 1:1 ethanol water is soaked, and the Kynoar hexafluoropropene and the high density that prepare are gathered
Ethene polymer blend barrier film is laid on commercial film, Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend every
Also soaked above film with ethanol water, another commercial barrier film is placed on thereon.End of operation, the wet film of preparation is sandwiched in two
Between the clean glass plate of block, 50 DEG C of h of oven drying 20 are placed in, produce commercial barrier film and Kynoar hexafluoropropene and height
Density polyethylene particle polymer blend barrier film composite diaphragm, prepared composite film thickness are 70 μm.
Lithium ion battery separator prepared by this example, not only has a higher porosity, and porosity is up to 58%；Also, 130
DEG C place 30 minutes, its thermal contraction about 1.2%, i.e., with preferable resistance to elevated temperatures.Excellent mechanical performance（MD:1400kg/
cm2, D:1000kg/cm2）And thermal stability（Composite diaphragm heats 1h residual mass at 120 DEG C and is after electrolyte activation
The 91.5% of quality before heating）, while decomposition voltage is up to 4.7V, the 4.3V of more commercial barrier film has a certain upgrade, lithium-ion electric
The more commercial barrier film lifting 198% of conductance, lithium ion transference number 0.58.
Embodiment 5
（1）The preparation of Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend barrier film：By high-density polyethylene
Alkene 180 DEG C of heating 45min in dibutyl phthalate are dissolved, and use emulsion polymerization to prepare particle diameter as 200-
400nm high density polyethylene (HDPE) particle, then by Kynoar hexafluoropropene, high density polyethylene (HDPE) particle and polyvinyl pyrrole
Alkanone respectively by mass fraction be 25%, 0.2% and 2.0% together with 73.8% organic solvent heating stirring obtain polymer and height
Uniform casting solution is blended in density polyethylene particle.Non-solvent used is deionized water, and first film formation time is 5s, and prepared barrier film is thick
Spend for 20 μm.
（2）Commercial barrier film and Kynoar hexafluoropropene is compound with high density polyethylene (HDPE) polymer blend barrier film：
Commercial polyethylene diagrams (thickness is 15 μm, porosity 36%) are laid on clean glass plate, upper surface body
Product is than being 1:1 ethanol water soaks, by the Kynoar hexafluoropropene prepared and high density polyethylene (HDPE) blending polymerization
Thing barrier film is laid on commercial film, and Kynoar hexafluoropropene also uses second with high density polyethylene (HDPE) polymer blend diaphragms
Alcohol solution is soaked, and another commercial barrier film is placed on thereon.End of operation, the wet film of preparation is sandwiched in two blocks of clean glass
Between plate, 50 DEG C of h of oven drying 20 are placed in, produce commercial barrier film and Kynoar hexafluoropropene and high density polyethylene (HDPE)
Grain polymer blend barrier film composite diaphragm, prepared composite film thickness are 55 μm.
Lithium ion battery separator prepared by this example, not only has a higher porosity, and porosity is up to 54%；Also, 130
DEG C place 30 minutes, its thermal contraction about 2.2%, i.e., with preferable resistance to elevated temperatures.Excellent mechanical performance（MD:1300kg/
cm2,TD:900kg/cm2）And thermal stability（Composite diaphragm heats 1h residual mass at 120 DEG C and is after electrolyte activation
The 90.5% of quality before heating）, while decomposition voltage is up to 4.6V, the 4.3V of more commercial barrier film has a certain upgrade, lithium-ion electric
The more commercial barrier film lifting 180% of conductance, lithium ion transference number 0.55.
Claims (7)
1. a kind of preparation method of lithium ion battery separator, it is characterised in that comprise the following steps：
（1）The preparation of Kynoar hexafluoropropene and high density polyethylene (HDPE) polymer blend barrier film：High density polyethylene (HDPE) is existed
100-220 DEG C of heating 10-60min is dissolved in dibutyl phthalate, and preparing particle diameter using emulsion polymerization is less than
600nm high density polyethylene (HDPE) particle, then by Kynoar hexafluoropropene, high density polyethylene (HDPE) particle, pore former, organic
By 8-25%, 0.01-4%, 0.05%-5.0%, 66%-91.94% of total mass fraction, heating stirring is polymerize solvent together respectively
Uniform casting solution is blended in thing and high density polyethylene (HDPE) particle；Non-solvent used is deionized water, and first film formation time is 5s-2h, institute
Membrane thicknesses are prepared at 10 μm to 40 μm；
（2）Commercial barrier film and Kynoar hexafluoropropene is compound with high density polyethylene (HDPE) polymer blend barrier film：By thickness
It is laid in less than 30 μm, commercial polypropylene or polyethylene diagrams of the porosity more than 30% on clean glass plate, upper surface volume
Than for 1:1 ethanol water soaks, by the Kynoar hexafluoropropene prepared and high density polyethylene (HDPE) polymer blend
Barrier film is laid on commercial film, and Kynoar hexafluoropropene also uses ethanol with high density polyethylene (HDPE) polymer blend diaphragms
The aqueous solution is soaked, and another commercial barrier film is placed on thereon；End of operation, the wet film of preparation is sandwiched in two pieces of clean glass plates
Between, 10-50 DEG C of oven drying 3-20 h is placed in, produces commercial barrier film and Kynoar hexafluoropropene and high density polyethylene (HDPE)
Particle polymer blend barrier film composite diaphragm, prepared composite film thickness are 40-90 μm.
2. the preparation method of lithium ion battery separator according to claim 1, it is characterised in that：The step（1）In, have
Solvent is N- dimethyl acetamides or N-METHYLFORMAMIDE.
A kind of 3. preparation method of lithium ion battery separator according to claim 1, it is characterised in that：The step（1）
Described in pore former be one kind in polyvinylpyrrolidone, polyethylene glycol, organic molecule or LiCl inorganic salts.
A kind of 4. preparation method of lithium ion battery separator according to claim 1, it is characterised in that：The step（1）
Described in Kynoar hexafluoropropene and high density polyethylene (HDPE) particle uniform each active ingredient mass fraction of casting solution be blended be：
Kynoar hexafluoropropene mass fraction is 15%-20%, and pore former mass fraction is 1%-3%, and high density polyethylene (HDPE) quality is divided
Number is 0.1%-2.0%, and wherein the mass percent of organic solvent is 75-83.9%.
A kind of 5. preparation method of lithium ion battery separator according to claim 1, it is characterised in that：The step（1）
In, first film formation time is 10s-1.5h, and prepared membrane thicknesses are at 15 μm -40 μm.
A kind of 6. preparation method of lithium ion battery separator according to claim 1, it is characterised in that：The step（2）
In, commercial polypropylene or polyethylene diagrams thickness used are 15 to 30 μm, porosity 30-50%.
A kind of 7. preparation method of lithium ion battery separator according to claim 1, it is characterised in that：The step（2）
In, oven drying temperature is 30-50 DEG C, drying time 3-10h；Prepared composite film thickness is 45-90 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510577172.XA CN105118946B (en) | 2015-09-13 | 2015-09-13 | A kind of preparation method of lithium ion battery separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510577172.XA CN105118946B (en) | 2015-09-13 | 2015-09-13 | A kind of preparation method of lithium ion battery separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105118946A CN105118946A (en) | 2015-12-02 |
| CN105118946B true CN105118946B (en) | 2018-03-20 |
Family
ID=54666883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510577172.XA Active CN105118946B (en) | 2015-09-13 | 2015-09-13 | A kind of preparation method of lithium ion battery separator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105118946B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065816A (en) * | 2018-08-14 | 2018-12-21 | 湘潭大学 | A kind of polyurethane-nano material composite diaphragm and Preparation method and use |
| CN109786624A (en) * | 2019-01-16 | 2019-05-21 | 北京卫蓝新能源科技有限公司 | A kind of preparation method and ion battery of ion battery porous septum |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471432A (en) * | 2007-12-27 | 2009-07-01 | 比亚迪股份有限公司 | Diaphragm and preparation method thereof as well as lithium ion battery |
| CN102386357A (en) * | 2011-10-28 | 2012-03-21 | 浙江南都电源动力股份有限公司 | Preparation method for polymeric composite diaphragm of high-performance lithium ion battery |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1232577C (en) * | 2003-12-24 | 2005-12-21 | 中国科学院广州化学研究所 | Process for preparing polymer diaphragm for lithium ion cell |
| CN101127392A (en) * | 2006-08-17 | 2008-02-20 | 李鑫 | A secure lithium ion electric core and its making method |
| CN105150655B (en) * | 2009-03-09 | 2018-09-14 | 旭化成株式会社 | Separator and its manufacturing method is laminated |
| KR101267283B1 (en) * | 2013-01-25 | 2013-05-27 | 톱텍에이치앤에스 주식회사 | Separator for secondary battery having wettability |
| US20150000118A1 (en) * | 2013-06-26 | 2015-01-01 | Xin Zhao | Method for manufacturing graphene-incorporated rechargeable li-ion battery |
| CN104479166A (en) * | 2014-12-23 | 2015-04-01 | 中南大学 | Preparation method of PVDF (polyvinylidene fluoride) mixture lithium-ion battery separator |
-
2015
- 2015-09-13 CN CN201510577172.XA patent/CN105118946B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471432A (en) * | 2007-12-27 | 2009-07-01 | 比亚迪股份有限公司 | Diaphragm and preparation method thereof as well as lithium ion battery |
| CN102386357A (en) * | 2011-10-28 | 2012-03-21 | 浙江南都电源动力股份有限公司 | Preparation method for polymeric composite diaphragm of high-performance lithium ion battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105118946A (en) | 2015-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wu et al. | PVDF/PAN blend separators via thermally induced phase separation for lithium ion batteries | |
| Du et al. | A mechanically robust, biodegradable and high performance cellulose gel membrane as gel polymer electrolyte of lithium-ion battery | |
| CN105304847B (en) | A kind of application of heat resistant type porous septum in lithium ion battery | |
| CN104140502B (en) | A kind of lithium ion battery separator binding agent, preparation method and use the barrier film of this binding agent | |
| CN102320133A (en) | A kind of polyolefin battery separation film and preparation method thereof | |
| Kim et al. | Electrochemical characterization of gel polymer electrolytes prepared with porous membranes | |
| CN105529496B (en) | Gel polymer electrolyte membrane and preparation method thereof | |
| CN102593403B (en) | Diaphragm for high thermal safety temperature lithium ion cell and preparation method thereof | |
| Guo et al. | Porous polymer electrolyte based on poly (vinylidene fluoride)/comb-liked polystyrene via ionic band functionalization | |
| CN102754267A (en) | Composite gel electrolyte film for secondary battery, and secondary battery | |
| Huai et al. | Preparation and characterization of a special structural poly (acrylonitrile)-based microporous membrane for lithium-ion batteries | |
| CN106450327A (en) | Method for improving adhesive performance of lithium battery polyvinylidene fluoride by irradiation | |
| Li et al. | Electrochemical performance of gel polymer electrolyte with ionic liquid and PUA/PMMA prepared by ultraviolet curing technology for lithium-ion battery | |
| CN109585759A (en) | A kind of gel-like structure lithium electric separator, preparation method and solid lithium battery | |
| CN111370625A (en) | Aramid fiber phase-transition coating lithium ion battery diaphragm and preparation method thereof | |
| CN108807797A (en) | A kind of anti-overcharge lithium electricity composite diaphragm and preparation method thereof | |
| CN103524774A (en) | Method for preparing high-performance lithium-ion battery diaphragm through vacuum ultraviolet grating modification | |
| CN105118946B (en) | A kind of preparation method of lithium ion battery separator | |
| Wen et al. | Enhanced electrochemical properties of a novel polyvinyl formal membrane supporting gel polymer electrolyte by Al2O3 modification | |
| CN104319361A (en) | Method for preparing composite diaphragm | |
| Yang et al. | An interlayer containing dissociated LiNO3 with fast release speed for stable lithium metal batteries with 400 wh kg− 1 energy density | |
| CN101250276A (en) | Preparation method of modified diaphragm for polymer lithium-ion battery | |
| CN104332641A (en) | Preparation method of composite bipolar plate | |
| CN1232577C (en) | Process for preparing polymer diaphragm for lithium ion cell | |
| Vineeth et al. | Polymer blend nanocomposite electrolytes for advanced energy storage applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190924 Address after: 443200 East Side of the Intersection of Xiannu Jianghan Avenue and Xiannu Third Road in Zhijiang City, Yichang City, Hubei Province Patentee after: Hubei Jiangsheng New Materials Co., Ltd. Address before: Yuelu District City, Hunan province 410083 Changsha Lushan Road No. 932 Patentee before: Central South University |
|
| TR01 | Transfer of patent right |